Semigloss paint can be purchased in latex or oil-based formulas. Removing the stains from paint differs in technique due to the paint's properties. The best way to remove any stain is to clean the area before the stain dries and sets in; this is sometimes impossible and aggressive methods may be needed.
Latex Semigloss Paint
Treat the stain while it is fresh. Keep the fabric wet by soaking the stained item in cold water.
Wash the item in cool water with a heavy-duty laundry detergent.
Treat dried paint stains (paint that has been dry for six to eight hours) by removing the oily/waxy components first using dry-cleaning solvent, followed by removing the dye/ pigment component using fabric safe bleach.
Wash the item in hot water, rinse and repeat step three if necessary.
Oil-based Semigloss Paint
Treat the stain while wet using paint thinner. Use a sponging technique to isolate the paint, keeping it from spreading to other areas.
Pad the work area with clean paper towels or rags. Keep in mind that these will be stained when the job is done.
Place the stained area of the fabric face down over the padded work area.
Dampen a white cloth with a solvent such as turpentine or alcohol and pat the stain from the back side. Wipe the stain from the outer edge to the center to reduce spreading.
Move the stained area often to clean spots on the padding as you work so there is always a clean under-pad to work on. Repeat the fourth and fifth steps until the stain is gone.